US4631153A - Throttle control device for general purpose engine - Google Patents

Throttle control device for general purpose engine Download PDF

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Publication number
US4631153A
US4631153A US06/811,328 US81132885A US4631153A US 4631153 A US4631153 A US 4631153A US 81132885 A US81132885 A US 81132885A US 4631153 A US4631153 A US 4631153A
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US
United States
Prior art keywords
throttle
choke
lever
control panel
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/811,328
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English (en)
Inventor
Shinichi Tamba
Toru Ogino
Noboru Fukui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Motors Ltd
Original Assignee
Kawasaki Jukogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Jukogyo KK filed Critical Kawasaki Jukogyo KK
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Publication of US4631153A publication Critical patent/US4631153A/en
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Expired - Fee Related legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/02—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling being chokes for enriching fuel-air mixture

Definitions

  • This invention relates to a throttle control device for the general purpose engine.
  • FIG. 1 is a front view of an embodiment of the throttle control device for the general purpose engine of the prior art
  • FIG. 1a is a sectional view of the control panel showing the mounting of the throttle and choke levers
  • FIGS. 2 and 3 are front views of the throttle control device for the general purpose engine of the present invention.
  • FIG. 4 is a sectional view taken along the line IV--IV of FIG. 3.
  • the throttle lever In the throttle control device for the general purpose engine the throttle lever is hitherto independent from the choke lever, so that it is difficult to take a timing of their motion in each condition, i.e. slow movement, fast movement, and choke and the smooth throttle control can not be carried out.
  • the control operation In case of the device, in which the control operation should be done near the hand as in the moving machine, the control operation is troublesome. Accordingly a system, in which the throttle lever and the choke lever have a interlocking motion with each other, has been adopted, but the device is complicated and expensive, and the regulation of an idling motion is very difficult.
  • a carburetor is designated by 1, a choke valve by 2, a throttle valve by 3, and an arm attached to the choke valve 2 by 4.
  • a return spring 5 is hung at one end on the arm 4 and at another end on the carburetor 1.
  • 6 designates an arm attached to the throttle valve 3.
  • One end of a throttle link 7 is engaged with a free end of the arm 6 and the other end of the throttle link 7 is engaged with a free end of a governor arm 8.
  • a spring 9 is tensioned between the free end of the arm 6 and the free end of the governor arm 8. If necessary the spring 9 can be wound around the throttle link 7.
  • 10 designates a control panel and a throttle lever 11 is pivotally supported by a shaft fixed on the control panel 10.
  • a choke lever 12 is pivotally supported on the shaft.
  • a spring 13 is tensioned between a curved portion 11a at a end of the throttle lever 11 and a middle portion of the governor arm 8.
  • the throttle lever 11 and choke lever 12 are biassed against a flange of the shaft 10a of the control panel by the thrust force of a suitable member such as conical spring washer 10b.
  • a further washer 10c is inserted between the throttle and choke levers.
  • the throttle lever is held stationary relative to the control panel 10 opposed to the force of the spring 13 by the frictional force between the throttle lever and the shaft. However any excessive external force such as the operator's finger as shown in FIG. 1a can rotate the throttle lever.
  • a claw 14 is formed on a periphery of a supported portion of the throttle lever 11 as a bend portion and it is used for rotating the choke lever 12.
  • a free end of the choke lever 12 is engaged with one end of a choke link 15 and the other end thereof is engaged with the arm 4 of the choke valve 2.
  • a spring 16 is tensioned between the arm 4 and the free end of the choke lever 12. If necessary the spring 16 can be wound around the choke link 15.
  • the throttle lever 11 is rotated from a slow position A.
  • the governor arm 8 is rotated clockwise through the spring 13 by the throttle lever 11.
  • the arm 6 is rotated through the throttle link 7 by the governor arm 8 and it rotates and opens the throttle valve 3.
  • the throttle lever 11 reaches a fast position B the throttle valve 3 is fully opened.
  • the claw 14 of the throttle lever 11 comes in contact with the side edge of the choke lever 12, then it rotates the choke lever 12 clockwise until the throttle lever 11 arrives to the choke position C under holding of the throttle valve 3 in the fully opened position.
  • the arm 4 is rotated against the force of the return spring 5 through the choke link 15 by the choke lever 12, and the choke valve 2 is closed.
  • FIG. 1 shows the idling condition of the engine.
  • the engine speed is controlled dependent on the balance between the force of the spring 13 to increase the speed and the centrifugal force of the weights D for decreasing the speed.
  • a clockwise rotation of the throttle lever 11 increases the speed and a counterclockwise rotation therefore decreases the speed.
  • the invention has been developed for the purpose of obviating the aforesaid disadvantages of the prior art. Accordingly, the invention has an object the provision of an improved throttle control device for the general purpose engine of the type in which the control panel pivotally supporting the throttle lever is rotatable.
  • the maximum speed of the engine can be adjusted successively by a very easy method.
  • the invention has as its object the provision of the throttle control device in which the throttle lever and the choke lever are formed integral with each other.
  • the construction of the throttle control device is simplified and the assembly of the device is simplified. Further in the present invention the motions of each portion are accurate and easy.
  • FIG. 2 there is shown a front view of the throttle control device for the general purpose engine of the present invention.
  • the same portions as shown in FIG. 1 are designated by the same numeral symbol, and the detailed description of them are omitted.
  • a fastening bolt 17 is so arranged that it is positioned on a elongation of the choke link 15 in its length direction.
  • the control panel is fixed by fastening the bolt 17 and is rotatable by loosening the bolt 17.
  • An elongated hole 18 is formed at a left side and upper side portion of the panel 10.
  • the elongated hole 18 is formed as an arc, the center of which is positioned on a position of the bolt 17.
  • a guide bolt 19 is inserted through the elongated hole 18.
  • the control panel 10 is swingable around the bolt 17 by guiding the elongated hole 18 with the guide bolt 19.
  • the slow position A of the throttle lever 11 can be easily adjusted after tilting of the control panel 10.
  • the throttle lever 11 is returned toward the initial position for a suitable distance for adjusting the slow position, and the slow position of the throttle lever 11 is settled at this position by the tension force of the spring 13.
  • the tilting angle of the throttle lever 11 from the slow position to the fast position B is increased.
  • the choke lever 12 is rotated slightly counterclockwise relative to the control panel 10, as the control panel 10 is rotated clockwise and the free end of the choke lever 12 is engaged with the choke link 15.
  • the throttle lever 11 By rotating the control panel 10 along the arcuated elongated hole 18 counterclockwise on the contrary, the throttle lever 11 is at its supported portion turned together with the control panel and the throttle lever 11 is turned the same angle as the control panel 10, so that the tilting angle of the throttle lever 11 at the slow position A is decreased. A is decreased by the adjustment of the slow position of the throttle lever 11.
  • the choke lever 12 is turned slightly clockwise relative to the control panel 10, as the free end of the choke lever 12 is engaged with the choke link 15. Therefore the rotating angle of the throttle lever 11 from the slow position A to the fast position B is decreased, and the rotating range of the throttle lever 11 is decreased, so that the tension force of the spring 13 is decreased and at that time the maximum speed of the engine is adjusted.
  • the control panel 10 When the control panel 10 is turned in the range of the elongated hole 18 for the adjustment of the engine speed, only the choke link 15 is swung slightly and the opening degree of the choke valve 2 is unchanged.
  • the control panel 10 is formed so that it is wider, and a throttle lever shaped in V-form is supported by the shaft at a left side in the middle portion of the control panel.
  • the throttle lever 20 is formed integrally with the choke lever. Between left arm 20a of the throttle lever 20 and the governor arm 8 the spring 13 is tensioned.
  • a right arm 20b of the throttle arm 20 has a recess 21 at an outer edge on the free end thereof.
  • An engagement hole 13a formed in the governor arm 8, in which one end of the spring 13 is engaged, is arranged on an elongation of a line between an engagement hole 13b formed in the left arm 20a of the throttle lever 20 and a center of the shaft supporting the throttle lever 20.
  • the control panel 10 has a arcuated slide hole 22, the radius center of which is arranged on the shaft supporting the throttle lever 20 at a left side on the under portion thereof. With the slide hole 22 a hook portion 24 is slidably engaged.
  • the one end of the choke link 23 is bent in a right angle and the point portion thereof is bent in a reverse U-form as shown in FIG. 4 and forms the hook portion 24.
  • the choke link 23 has a engagement portion 25 at a middle portion thereof.
  • the engage portion 25 is formed by bending a portion of the choke link 23 for one round.
  • a spring 26 is tensioned between the engagement portion 25 and the one end of the slide hole 22 (or at a left side in the lower portion of the control panel 10).
  • the other end of the choke link 23 is engaged with the arm 4 of the choke valve 2.
  • the right arm 20b of the throttle lever 20 is engaged at the recess 21 thereof with the portion bent in the right angle of the end of the throttle link 23.
  • the throttle lever 20 is turned to the choke position C
  • the choke line 23 is pushed by the right arm 20b against the force of the spring 26, which is used for preventing the play of the choke link 23, and the hook portion 24 shaped in the reverse U-form is slid along the slide hole 22.
  • the arm 4 connected with the other end of the choke link 23 is turned and the choke valve 2 is turned and closed by the movement of the choke line.
  • the spring 26 As the spring 26 is engaged with the engagement portion 25 formed in the choke link 23 and the slide hole 22 formed in the control panel 10 (or with a portion of the control panel 10) and tensioned therebetween, the play of the choke link 23 in turning to and from, and of the throttle 20 between the fast position B and choke position C is prevented.
  • the spring 26 fills the function of the return spring for the choke valve 2.
  • the speed of the engine can be adjusted by loosening the bolt 17 and turning the control panel 10 around the bolt 17 for changing the turning range of the throttle lever 20 suitably.
  • the turning range of the throttle lever is suitably changeable by moving the control panel and the maximum speed of the engine is adjustable.
  • throttle lever formed integrally with the choke lever is provided in the throttle control device, so that the motion from the slow position through the fast position to the choke position can be carried out easily and accurately by turning of only the throttle lever.
  • the spring for preventing the play of the choke link is used as the return spring and the choke link is engaged with the control panel without using other means by using the end portion of the choke link, which is formed as a hook portion in the reverse U-form shaped by bending itself and is engaged with the arcuated slide hole, in addition to the integral form of the choke lever and the throttle lever. Therefore the mechanism of the control system is simplified and the number of the parts is decreased. Further the assembly is simplified.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
US06/811,328 1983-09-06 1985-12-19 Throttle control device for general purpose engine Expired - Fee Related US4631153A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58-163893 1983-09-06
JP58163893A JPS6056154A (ja) 1983-09-06 1983-09-06 汎用エンジンのスロツトルコントロ−ル装置

Related Parent Applications (1)

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US06645173 Continuation-In-Part 1984-08-28

Publications (1)

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US4631153A true US4631153A (en) 1986-12-23

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US06/811,328 Expired - Fee Related US4631153A (en) 1983-09-06 1985-12-19 Throttle control device for general purpose engine

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US (1) US4631153A (ja)
JP (1) JPS6056154A (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773371A (en) * 1987-11-03 1988-09-27 Tecumseh Products Company Override speed control having governed idle
US6550749B2 (en) * 2000-05-22 2003-04-22 Dolmar Gmbh System for actuating a carburetor of an internal combustion engine
US6561496B2 (en) * 2001-05-04 2003-05-13 Walbro Corporation Carburetor throttle control detent mechanism
US20060208371A1 (en) * 2005-03-07 2006-09-21 Honda Motor Co., Ltd. Carburetor throttle valve control system
US7353802B1 (en) * 2007-01-10 2008-04-08 Briggs & Stratton Corporation Governor with take-up spring
US20090266334A1 (en) * 2008-04-25 2009-10-29 Honda Motor Co., Ltd. General purpose internal combustion engine
WO2012140687A1 (en) * 2011-04-11 2012-10-18 Husqvarna Ab Choke structure of handheld work tool
US9074535B1 (en) 2013-12-19 2015-07-07 Kohler Co. Integrated engine control apparatus and method of operating same
US9261030B2 (en) 2013-05-20 2016-02-16 Kohler Co. Automatic fuel shutoff
US10267242B2 (en) * 2017-02-24 2019-04-23 Hangzhou Power Young Technology Co. Ltd. Combination control assembly of dual fuel internal combustion engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61125648U (ja) * 1985-01-25 1986-08-07
JPS62117242U (ja) * 1986-01-17 1987-07-25

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1691487A (en) * 1926-07-30 1928-11-13 Leveque Charles Louis Carburetor
US2873731A (en) * 1956-02-27 1959-02-17 Tecumseh Products Co Engine control device
US2982275A (en) * 1957-11-14 1961-05-02 Clinton Engines Corp Carburetor control
US3305223A (en) * 1965-09-30 1967-02-21 Briggs & Stratton Corp Carburetor with improved choke valve control
GB1065241A (en) * 1963-03-06 1967-04-12 Villiers Engineering Co Ltd Carburetters for internal combustion engines
US3342465A (en) * 1966-06-17 1967-09-19 Acf Ind Inc Carburetor
US4079708A (en) * 1975-03-05 1978-03-21 Andreas Stihl Maschinenfabrik Control device for the engine of an engine driven saw
US4490309A (en) * 1982-09-21 1984-12-25 Kawasaki Jukogyo Kabushiki Kaisha Integrated fuel control system for gasoline engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5117731A (ja) * 1974-08-02 1976-02-12 Mikuni Kogyo Kk Kikaki
JPS57180122U (ja) * 1981-05-11 1982-11-15

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1691487A (en) * 1926-07-30 1928-11-13 Leveque Charles Louis Carburetor
US2873731A (en) * 1956-02-27 1959-02-17 Tecumseh Products Co Engine control device
US2982275A (en) * 1957-11-14 1961-05-02 Clinton Engines Corp Carburetor control
GB1065241A (en) * 1963-03-06 1967-04-12 Villiers Engineering Co Ltd Carburetters for internal combustion engines
US3305223A (en) * 1965-09-30 1967-02-21 Briggs & Stratton Corp Carburetor with improved choke valve control
US3342465A (en) * 1966-06-17 1967-09-19 Acf Ind Inc Carburetor
US4079708A (en) * 1975-03-05 1978-03-21 Andreas Stihl Maschinenfabrik Control device for the engine of an engine driven saw
US4490309A (en) * 1982-09-21 1984-12-25 Kawasaki Jukogyo Kabushiki Kaisha Integrated fuel control system for gasoline engine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773371A (en) * 1987-11-03 1988-09-27 Tecumseh Products Company Override speed control having governed idle
AU599547B2 (en) * 1987-11-03 1990-07-19 Tecumseh Products Company Override speed control having governed idle
US6550749B2 (en) * 2000-05-22 2003-04-22 Dolmar Gmbh System for actuating a carburetor of an internal combustion engine
US6561496B2 (en) * 2001-05-04 2003-05-13 Walbro Corporation Carburetor throttle control detent mechanism
US20060208371A1 (en) * 2005-03-07 2006-09-21 Honda Motor Co., Ltd. Carburetor throttle valve control system
US7246794B2 (en) * 2005-03-07 2007-07-24 Honda Motor Co., Ltd. Carburetor throttle valve control system
US7353802B1 (en) * 2007-01-10 2008-04-08 Briggs & Stratton Corporation Governor with take-up spring
US20090266334A1 (en) * 2008-04-25 2009-10-29 Honda Motor Co., Ltd. General purpose internal combustion engine
US7854216B2 (en) * 2008-04-25 2010-12-21 Honda Motor Co., Ltd. General purpose internal combustion engine
WO2012140687A1 (en) * 2011-04-11 2012-10-18 Husqvarna Ab Choke structure of handheld work tool
US9261030B2 (en) 2013-05-20 2016-02-16 Kohler Co. Automatic fuel shutoff
US9739214B2 (en) 2013-05-20 2017-08-22 Kohler, Co. Automatic fuel shutoff
US9074535B1 (en) 2013-12-19 2015-07-07 Kohler Co. Integrated engine control apparatus and method of operating same
US10267242B2 (en) * 2017-02-24 2019-04-23 Hangzhou Power Young Technology Co. Ltd. Combination control assembly of dual fuel internal combustion engine

Also Published As

Publication number Publication date
JPH0247585B2 (ja) 1990-10-22
JPS6056154A (ja) 1985-04-01

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